Pressure-regulating apparatus.



E. MoLBAN. PRESSURE REGULATING APPARATUS.

APPLIoATIoH FILED JULY 1o, 1907.

Patented Sept. 2, 1913.

Z SHEETS-SHEET l.

Witwe/wao E. MOLEAN.

PRESSURE REGULATING APPARATUS.

APPLICATION FILED JULY 1o, 1907.

Patented Sept. 2, 1913.

2 SHEETS-SHEET 2.

I di! 7756 @nucl/tou @561km M 'EMBURY MULEAN, 'OFEBBOKLYNQNEW YORK.

PRESSUBE-REGUIJATING dAPIEABlAlJJTIJ'S.

Specication of Letters Patent.

'Pattent'ei Sept. 2,'1913.

, Application filed July 10, 1907. Serial No. 883,062.

To all whom z' may concern:

Be it known that I, EMBURY MCLEAN, a

citizen of: the United Sta-tesfanda resident of Brooklyn, borough ofBrooklyn, in the county ofrfKings and State of New York, haveV inventedcertain new and--useful Improvements in Pressure-Regulating Apparatus,of which the following is a specification.

This invention relates to pressure-regulating means, and in thepresent-instance, I have shown the same as lemployed in conjunction witha'furnace Jfor controlling the pressure of gases therein. This, however,is merely toillustrate one useof'tfhe invention, and I do not confinemyself to this specic use as the invention may be-em ployed forotherpurposes, such as the reguylation'of-pressure inza steamlboiler,which is one of a batteryof boilers supplying steam into =a common heador pipe,by the difference in pressure between the boiler and the header.lSuch a luse isshown and claimed in my co-pending application filed asoi' even-datehereof. i

The invention=consists in lthe construction, combination vandarrangement ofpa'rts set forthin and'ifalling Within the scope-0f theappended claims.

In 1 the 4aecompanyingy drawings wherein like characters of 'referenceindicate 'like parts iinffall the Niews, Figure `1 `is ya sideviewrpartlydn section of a steam boilerfurnacey equipped Awith myinvention, such view' showing 1a deecting yplate regulator controllingthe damperdnthe chimney' outlet to ithe boiler -furnace, 'and the meansby which the dalieetion of the `plate controls the position ofthedamper;=F1-g. 2v is anenlarged, detail sectional -view of f the.delecting plate. Fig. 4 Bf is yan enlarged detail sectional -view lofanother form-of deflecting platev provided with means for resisting` themotionI of said plate, and; meansl for/adjusting said resistance; Fig. 4is anenl=arged detail -view of Athe deeeting plate mounted on vanaxisother than the horizontal inA this instance, on-a vertioalaxis.

First referringl to the invention-as illustrated in- Figs. 1 1andf2|Iwill now describe the -same indetail. 4.A'indicates 'a furnace yand .B-fa boileroperated by the furnace. C is 'a blowersupplying'airtothed'urnace. -D is the chimney connection ofthefurnace and E a dampertherein. F indicates asan'entirety the delectingplateregulator locatedin the opening G in the wall of the furnace,

making communication between the interior of thefurnace'andl the outsideof the'latter.

AIPI isa valve operated by the motion 4of the plate F by means oftheeonnecting rodsf @nld h. The valve H controls the opening of \thesupplylpipe S connected with any suitable Vsource of flu-id pressure,'and the -wastelpipe'W leading from the valve casing to anypointotdischarge. I is a motor -comprisiing'ia cylindrical casi-ng z'andapisytonz2 which controls' the ymotion of the rod 8. :Thelpipe i*'eonnectsthe motor casing below the piston with the chamber of the4valve-H. A Weight 5 is secured to the rod 3 and the chain i connectsthe motor to the 'damper levere off the damper E, the weight e? beingVso arrangedthat it opens the damper when the chain slackens due to therising of the piston i2. `In these Figs-1 and 2 the deflecting, platereg-ulato-rF as shown, is constructedas-follows: The plate-F, which isof any suitable material, is supported in anysuitable manner ron theaxis f which is belowV the center of gravity, the plate havinga greaterarea on one side of the axis .thanon the other--in this case the axisybeing :at the edge of the plate-the entire `area is on .one side. VInthis instance the method of support shown is a knife edge sooketed-inithe bearing f?,'the rod'f being connected tolthefplateand to'thevalve rod L -as heretofore described. Under these conditions the plateis in an unstable condition of .equilibrium and -will rest against ioneori the other of the-stops fa'lan'd f4.

The operation islas follows: If the pressure -on the furnace side of theopening G is .greater than the pressure on the other side of-theplate,the latter will be deflected to' the stop f4, and, vice versa, if theoutside pressurevis vgreater than' the pressure in the furnace, suchplia-tefwill ,be deflected in the stop lf3. In the first condition lthevalve .H

shown in Fig. l` will assumera position whereby the sup lypipe S is opento the motor `I-and thepiiston- 2 will be raised,1 thusslackening-thechainrand permitting the damper to open, thereby reducingthe pressure 1n the furnace-chamber. When this pressure beeoniesI lowerthan' the outside pressurethe fd'eiiecting plate regulator 'F will bemoved to `:the position v-where it rests against the stepfa, therebyh-moving the valve II to a position ovherethe supply pipe S-is closed-and'thevent or Waste pipe W is opened to ,such axis.

the motor I, so that the Huid pressure in the motor cylinder is relievedthrough the pipe t and the pipe W. The weight- 5 lowers the piston 2 andthe chain i moves the damper toward its closed position. Under theseconditions the pressure in the furnace increases until it becomesgreater than the outside pressure, and the deflecting plate regulator Fis moved to the stop f* when the reverse operation heretofore describedtakes place. lIt will thus be seen that my pressure regulator willmaintain substantially the pressure inside the furnace as exists outsidethereof.

I have shown one means of controlling the ,pressure in the chamber ofthe furnace A, namely, by the movement of the damper E in the chimneyconnection D to the'furnace. A similar mechanism might be employed tocontrol the speed of an exhaust fan connected with G operate the steamvvalve of the engine driving the exhaust frame. Similarly'the samemechanism might be used to control the speed of the blower C supplyingair to the furnace. 0r, it could be used to control a damper in the airduct c. In all of these instances when properly adjusted the regulatorwould maintain the same pressure in the furnace chamber as existsoutside.

Referring to the modification shown in Fig. 3 the deiecting plate F ismounted on an axis 'flo which may be through or below its center ofgravity. In this figure it is shown as passing through the center ofgravity of the plate. The enlarged portion of the plate fu below theaxis f1 is equal in weight tothe portion of the plate above such axis,but the area of the plate below the axis is much smaller than the areaabove The plate is connected in the manner heretofore described, with avalve I-I. j is a spring acting to oppose the motion of the plate F andf and 14 are adjustable screw rodsfor regulating the resistance offeredby the spring to the motion of the plate. In this case manifestly anydesired pressure can be maintained inside the furnace, either greater orless than the outside pressure.

In Fig. 4 the plate is shown as mounted on an axis other than horizontaland in the case shown is mounted on a vertical axis, preferably`throughthe center of gravity, such plate having a greater area on one side ofthe axis than on the other. The operation is the same as that of theplate shown in Fig. 3.

In Figs. 2 and 3 the deflecting plate reguylator F is shown with theanges f15 and f1 which closely approach the wall f17 of the opening G.The purpose of these flanges is to form an elongated restricted spacebetween the plate and the edge of the furnace wall opemng to restrictthe flow of fluid D, by having the chain wall and thereby obtain moresensitive acl'ion of the regulator.

Having thus Idescribed my invention, what I claim as new and desire tosecure by Letters Patent, is:

l.' The combination of a chamber having an opening therein, of aregulating plate located at said opening, said plate being op; eratedupon on one side by the pressure within the cham-ber and at the oppositeside by the pressure outside the chamber, such plate being pivotallysupported on an axis throughvits center of gravity and having a greaterarea on one side of its axis than on the other, means for returning theplate to neutral position, and means controlled by the motion of theswinging plate to regulate the pressure within the chamber.

2. The combination with a chamber having an opening therein having aside Wall, a swinging plate regulator located within said openmg andmovable through the same, and acted upon by the iiuid pressures onopposite sides thereof, means for resisting the deiiecting motion of theplate, and means controlled by the motion of the plate to regulate thepressure at the opening, and means at the edge ofthe plate cooperatingwith said side wall the opening forming and maintaining an elongatedrestricted space to resist the flow of luid between the plate and theedge of said opening. i

3. The combination with a chamber having a passageway therein, of aswinging plate-supported on an axis through its center of gravity andadapted to be acted upon by the pressure inslde the chamber, the pivotfor said plate being located adjacent the base of said opening, and thepart of the plate subjected to the pressure extending upward from thepivot to a point adjacent the top of the opening, and means controlledby the plate for regulating the pressure within the opening.

t. The combination of a chamber having an opening therein, a swingingregulating plate located within said opening and conforming thereto andmovable through the opening, and a liange in said plate coperating withthe edge of the opening during the movement of the plate to maintain arestricted-space when the plate swings on its y fulcrum.

and the edge'of lthe opening when the plate swings on its fulcrum. l

6. In a regulating apparatus in combination, a chamber Wall having anopening, a regulating plate pivoted in said opening, said plate beingoperated upon one side by the pressure Within the chamber and on theopposite side by the pressure outside the chamber, such plate being suported to swing on an axis approximately t rough its center of gravity,and having a greater area on one side of its axis than on the other,means other than gravity tending'to bring the plate to a neutralposition, and means controlled by the motion of the swinging plate toregulate the pressure Within the chamber.

7. In a regulating apparatus in combination, a chamber Wall having anopening, a regulating plate pivoted in said opening, said plate beingoperated upon one side by the pressure Within the chamber and on theopposite side by the ressure outside the chamber, such plate Ibeingsupported to swing on an axis approximately through its center ofgravity, and having a greater area on .one side of its axis than on theother, a spring tending to bring the plate to a neutral position, andmeans controlled by the motion of the swinging plate to regulate thepressure within the chamber.

8. The combination of a chamber having an opening therein, a swingingregulating plate located Within said opening and movable through thesame, said plate being operated upon on one face by the pressure outsidethe chamber and on the opposite face by the pressure inside the chamberto move the plate, and means for so movably support-l lng the regulatingplate that an excess of not have to overcome the action of gravityv inorder to move the plate, said plate having a flange forming with a Wallof the opening a restricted clearance space during the movement of theplate to retard the ioW of fluid through said clearance.

10. Means for regulating furnaces, in combination with a furnace Wallhaving an opening, a Swingin plate mounted in said openin and movab ethrough the same, and expose on its opposite faces to pressure insideand outside the furnace Wall, means for somovably supporting said platethat the excess of pressure on one face `does not have to overcome theaction of gravity to swing the plate, and means operable by the plate toregulate the furnace.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EMBURY MCLEAN. Witnesses:

R. B. CAVANAGH, OSCAR Asormn.

